No problem, we've got 7829 and 660 to multiply
7829 × 660 = 660 × (7829)
+ 660 × 9 what gives us 5940
+ 660 × 20 that equals 13200
+ 660 × 800 that equals 528000
+ 660 × 7000 yielding 4620000

= 5167140
